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Rev. 1.4
7.3.3.6. TAM PSTN
This mode is used to answer an incoming call with OGM playback and ICM recording. The caller may perform local
TAM operations (i.e. record OGM, review ICM) via remote DTMF control. The modem is off-hook routing audio
between the DAA and the DTE interface; however, audio is also available at the Si3000 (via UB5 path) so call
screening is possible via the speaker (LINEO) while the microphone is muted. The modem voice path is configured
for half-duplex audio with the speakerphone algorithm disabled. Side tone is disabled. Handset TX/RX coefficients
are applied. The Si3000 is using the LINEI and LINEO signals with speakerphone gain settings. This mode is
supported by the Si2418/29/36/38 parts.
Figure 33. System Voice Modes
Handset
Speakerphone
TAM
Hands-Free
TAM
PSTN
Initialize
RIN
G
(An
swe
r O
n)
On-
Hoo
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nt
(nu
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Ha
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Ra
ise
d E
ve
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SP
B
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on
On
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d E
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o
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S
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R
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E
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Han
dse
t
Rais
ed E
ven
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SP B
utton
Off E
vent
(Han
dset
Off-
Hoo
k)
TAM
Handset
H
an
ds
et
Lo
w
er
ed
o
r
Ab
or
t E
ve
nt
Us
er
Re
qu
es
t +
Ha
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t R
ais
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Ev
en
ts
Содержание Si2404
Страница 2: ...AN93 2 Rev 1 4 ...
Страница 27: ...AN93 Rev 1 4 27 Figure 7 Parallel Interface Read Timing Figure 8 Parallel Interface Write Timing ...
Страница 200: ...AN93 200 Rev 1 4 Figure 31 TAM Handset and Speakerphone Voice Paths ...
Страница 201: ...AN93 Rev 1 4 201 Figure 32 Si3000 Codec Gain and Signal Selection Options ...
Страница 290: ...AN93 290 Rev 1 4 Figure 57 256 Band Spectral Display Figure 58 2048 Band Spectral Display ...
Страница 305: ...AN93 Rev 1 4 305 Figure 76 Parallel or SPI Port Interrupt Service Flowchart ...